Insulating material



Feb. 16, 1932. 1 B SAWYER l 1,845,444

INSULATING MATERIAL f Filed Aug. 28. 1929 Patented Feb. 41e, i932 i t (UNITED, s

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PAT

ENTI oFFlfcE LEIEs'rEB B.. sama, or amaai, NEW Yon-x, AssIG'Non 'ro rnE EEoTEcTAHooD ,coaro'rroir or AUBURN, NEW Yonai, .a conromrron or NEW Yom;

This invention relates to improvements in pated or radiated from the motors have in,

creased tremendously. This increased radiation of heat'materiallly aects the comfort of the passengers of the automobile, especiali ly those occupying the seat immediately ybehind the motor. -The heatedtair not only gains access to the seat compartmentsbut "the Hoor of the machine becomesratherhot and radiates an appreciableamount of heat.

In all, the conditions are such @at a ride ofY any duration, especially in the warmer months or in a closed type of car, is .very tiresome and wearing on the passengers and particularly the operator. The manufacturers ofv automobiles, appreciating these conditions, have been directing their-attention for some time to the problemy of rendering their ears more comfortable by eliminating or minimizing the cause of the discomfort. To this end, the present invention seeks to provide a novel he'at^- insulating material wespecially adapted for .use as a oor covering in automobiles', and which willalsopossess sound.V

deadening properties. a,

A still further object is to produce a heat insulating material having a high degree of resiliency and iexibility and being, at thee I same timeyuexceedingly tough so that it can not be easily torn and possessing good wear-- ing qualities.l Resiliency is important as the material is adapted for use beneath or in.;

conjunction with the rubber mat generally `,utilized asa'floor covering in automobiles. v

the material'being pliant, no preliminary I molding orshaping is required, regardless of where it is used in the car.A For instance, where the resent material is used on the dash a sheet o it readily conform to the the-element that is incorporated in the inloo- Flexibility is likewise important because;

TING MATERIAL Application tiled August 28, 1%29. Serial, No.` @$2,006.

contour of the dash witholit the necessity ofy preliminarily shaping the material.

It ispreferred that the heat insulating element be of a non-cellular character, such as asbestos, andthe asbestos is combined with other elements that lend protection thereto and that impartresiliency and toughness to the lfinished productg In view of this a`fur ther: object is to rovide a novel method of combining the as stos and other elements wherein the adhesive used insecuring the several elements together is so applied to the 'asbestos that there is no danger of the latter tearing or pulling to pieces. i

ln the accompanying drawings illustrating the referred embodiment of the present invent1on, y g f f Figure l is a perspective view of a section of the heat insulating material, the several thicknesses or elements being shown as partially pulled apart orfseparated for purposes of illustration;

Fig. 2 is a sectional view showing the present material used in conjunction with a rubber mat on thevioor and dash .of an` auto- .mobile; and

Fig. 3 is a diagrammatical illustration of the preferred methodof producing the presdesigned primarily for, use in automobilesf In connection with such usage it is essential that the material prevent, to the highest degrec possible, the admission of heat from the motor to the compartmentI of the front seat of the car. For this reason, a sheet of noncellular-material, preferably sheet asbestos,

indicated at 11 is relied upon principally for ,the heat insulating properties of the finished product.- v The asbestos aper' 11, however, cannot withstand mucha rasion, so that it is preferred to line one side thereof with a proplied to the sheet of asbestos by any suitable adhesive. `It will be noted that the layer of jute fibre is comparatively thick. This increases the resiliency of the finished product, a characteristic that cannot be obtained with a Wolven material except at a prohibitive cost.'l

This resilient layer of pressed fibre 12 is essential because it not only prevents heat being radiated from the asbestos sheet, but on account of the resiliency of this fibrous layer the life of a rubber mat superimposed there,- on, as illustrated in Fig. 2, is greatly prolonged. Likewise, the use of the burlap 13, or its equivalent, is advantageous, asl it acts not only as a carrier for the pressed jute fibre, but also prevents tearing of the asbestos without detracting from thebflexibility of the finished product, a feature that is important, as' above pointed out.

As the sheet of asbestos paper is rather easily torn, especially when damp with the adhesive used in securing the felt 10 and jute covering 12 thereto, it is preferred that these elements be assembled as shown in Fig. 3. In this proposed method the continuous web o-f asbestos paper 11 is fed from a roll 14 to and bet-Ween suitable pressure rolls 15. At

a point between roll 14 and rolls 15 the opposite sides of the web are sprayed with suitable adhesive from jets 16, the spray or volume of adhesive being controlled in any desired manner. As the. web, coated with the adhesive, passes between rolls 15, the strip of felt 10 and the layer ofjute fibre 12 carried by the burlap 13 are likewise fedbetweensaid rolls, one on each side of the asbestos. The felt 1() and jute fibre 12 may be fed -from suitable rolls 17, 18. With this method, there is no tension on the asbestos except the pull exerted by the pressure rollers 15. .In other words, no rolls are necessary for applying the adhesive to the asbestos. This is important ,seat compartment have been lined the passengers have been noticeably more comfortable. Not only are the passengers more comfortable, so that 1 ng ltrips arenot as tiresome,

but the life of the rubber matting` generally used is greatly prolonged. This is true, be-

cause the/ resiliency of the present material glves the rubber a better cushioning effect,

and, by preventing the hot air from the motor gaming access to the rubber, thelatter does not dry out. It will not. therefore, ,disintefibre and the asbestos.

2. A flexible sheet-like body of.heat nsulating material comprising a layer of asbestos, a protective covering on one side of sald asbestos, a comparatively thick layer f pressed jute fibre 011` the opposite side of said asbestos, and a layer of burlap inter- LEICESTER B. SAWYER.

because, where rolls are utilized for applying the adhesive, the asbestos paper, beingL damp and subjected to this additional tension, is

quite frequently torn. Again, the glue or other adhesive hardens on lthe rolls and particles of the asbestos paper adhere thereto,

` 'L with-the ,result that the paper is at least partially, if not totally, destroyed.

Heat insulating material made according A, to the present invention has been found to give excellent results in road tests and has been Aadopted as standard equipment in some instances. Of course, the entire body ofthe car might be lined with this material, but

' where only the dash and Hoor in the front ""posed. between said rasbestos and jute fibre. 

